By definition, a French Drain is a trench filled with gravel containing a perforated pipe that redirects surface water and groundwater away from an area. The perforated pipe along the bottom quickly vents water that seeps down through the upper gravel layer. HydroGuard utilizes French drain applications to address basement wall leaks, crawl-space moisture, and pressure against retaining walls.
The area of concern whether laid block or poured concrete wall is exposed, prepped and waterproofed. The drainage pipe and gravel are placed to move ground water away from the footing.
As a customer courtosey, any down spouts exiting into the French drain area are piped and buried along the side of the exit pipe.